iTunes weirdness

[Mark Taintor]

I upgraded to the iTunes 4.5 recently. It seems to work just fine, 
however, when I try to access iTunes from an email link or from the 
Apple website, I get a screen with a page about the iTunes software 
licencing agreement. After clicking that I agree with terms, I get the 
following message: "The iTunes Music Library file cannot be read 
because it was created by a newer version of iTunes". If I already have 
iTunes open, it works just fine. Any ideas about what's going on or 
what I can do to fix it?

Thanks very much,
Mark

Mark Taintor
Chanhassen, MN USA